Silicone RTV-538 (Addition type) for electric print circle,power supply, di-bond use RTV-538 (addition type silicone) has excellent chemical & physical properties, which generally applied on print circle board and power supply for protect from electric short and thermal conductivity。 Specification : viscocity ; 60,000 cps Specific Gravity : 1.06±0.03 Durometer hardness (ASTM D2240) : 40 (Hardness Shore A) Tensile strength(ASTM D412) : 22.0 kg/cm2 Tear strength : >20N/mm Elongation(ASTM D412) : 450% Shringkage : 0.1% Thermal conductivity : 0.21 w/m-K Volume resistivity : > 3.0 x 1014 ohm-cm Dielectric constant(60Hz) : > 25 Kv/mm Heat on lost : < 0.2% Operation process : weight Take RTV-538 and C-538 B by 10:1 (weight ratio). Defoaming place the mixture in vacuum vessel，kept vacuum lower than 100 mg Hg. Filler Be careful pouring silicone to the container, avoid Occur bubble Harden Curing 80℃X 30min.
